![](https://mosaic-expedition.org/wp-content/uploads/2020/08/20200713_mosaicleg4_grosfeldlisa-small-1200x675.jpg)
The Arctic plays an important role in the earth’s climate, but our knowledge about the winter there is limited.
Polarstern during Arctic summer with melt ponds at the MOSAiC Leg 4 expedition
The Arctic plays an important role in the earth’s climate, but our knowledge about the winter there is limited.